{"answers":{"affected":"5 open source packages ship an affected version, including composer/composer and composer. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-40176 in the wild and no public exploit code.","fix":"Upgrade composer/composer to a fixed version for your release line: 2.2.27 or 2.9.6.","what":"CVE-2026-40176 is a high-severity command injection vulnerability in composer, published on 15 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-40176 and fix it if it is affected.\n\nWhat it is: CVE-2026-40176 is a high-severity command injection vulnerability in composer, published on 15 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-40176 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- composer/composer (Packagist): affected from 1.0.0; fixed in 2.2.27\n- composer/composer (Packagist): affected from 1.0.0; fixed in 2.2.27\n- composer/composer (Packagist): affected from 2.3.0; fixed in 2.9.6\n- composer/composer (Packagist): affected from 2.3.0; fixed in 2.9.6\n- composer (Bitnami): affected from 1.0.0; fixed in 2.2.27, 2.9.6\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-40176/ (Markdown: https://insights.sbomify.com/CVE-2026-40176/index.md)","id":"CVE-2026-40176","markdown":"https://insights.sbomify.com/CVE-2026-40176/index.md","name":"CVE-2026-40176","record":{"aliases":["BIT-composer-2026-40176","DEBIAN-CVE-2026-40176","GHSA-wg36-wvj6-r67p","MINI-468x-f99p-m88f","MINI-7g3q-p72q-4m55","UBUNTU-CVE-2026-40176"],"analysis":{"component_type":"developer_tool","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"PHP dependency manager","requires_auth":"none","summary":"Attackers can execute arbitrary commands via malicious Perforce parameters in composer.json, affecting developers running Composer on untrusted projects.","user_interaction":"required","vuln_class":"command_injection"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"composer","vendor":"getcomposer"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-78","name":"Improper Neutralization of Special Elements used in an OS Command"},{"id":"CWE-20","name":"Improper Input Validation"}],"description":"Composer is a dependency manager for PHP. Versions 1.0 through 2.2.26 and 2.3 through 2.9.5 contain a command injection vulnerability in the Perforce::generateP4Command() method, which constructs shell commands by interpolating user-supplied Perforce connection parameters (port, user, client) without proper escaping. An attacker can inject arbitrary commands through these values in a malicious composer.json declaring a Perforce VCS repository, leading to command execution in the context of the user running Composer, even if Perforce is not installed. VCS repositories are only loaded from the root composer.json or the composer config directory, so this cannot be exploited through composer.json files of packages installed as dependencies. Users are at risk if they run Composer commands on untrusted projects with attacker-supplied composer.json files. This issue has been fixed in Composer 2.2.27 (2.2 LTS) and 2.9.6 (mainline).","ecosystems":["Bitnami","Packagist"],"exploits":{"exploitdb":0,"first_seen":"2026-04-16","github_poc":3,"max_poc_stars":2,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-04-16T04:29:29Z","kind":"github_poc","ref":"https://github.com/Saku0512/CVE-2026-40176-poc","stars":2,"title":null},{"date":"2026-04-17T05:48:33Z","kind":"github_poc","ref":"https://github.com/daptheHuman/cve-2026-40176-cve-2026-40261","stars":0,"title":null},{"date":"2026-06-15T10:35:51Z","kind":"github_poc","ref":"https://github.com/ikarolaborda/CVE-2026-40176","stars":0,"title":null}],"tier":"poc_unverified"},"has_fix":true,"headline":"Composer is vulnerable to Command Injection via Malicious Perforce Repository","id":"CVE-2026-40176","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":null,"products":[],"type":"command_injection","year":"2026"},"n_packages":5,"n_references":2,"next":{"headline":"Password bypass when 2FA is activated","id":"CVE-2026-40177"},"packages":[{"ecosystem":"Bitnami","fixed":["2.2.27","2.9.6"],"introduced":["1.0.0","2.3.0"],"last_affected":[],"package":"composer","purl":"pkg:bitnami/composer","source":"BIT-composer-2026-40176"},{"ecosystem":"Packagist","fixed":["2.2.27"],"introduced":["1.0.0"],"last_affected":[],"package":"composer/composer","purl":null,"source":"GHSA-wg36-wvj6-r67p"},{"ecosystem":"Packagist","fixed":["2.2.27"],"introduced":["1.0.0"],"last_affected":[],"package":"composer/composer","purl":"pkg:composer/composer/composer","source":"GHSA-wg36-wvj6-r67p"},{"ecosystem":"Packagist","fixed":["2.9.6"],"introduced":["2.3.0"],"last_affected":[],"package":"composer/composer","purl":null,"source":"GHSA-wg36-wvj6-r67p"},{"ecosystem":"Packagist","fixed":["2.9.6"],"introduced":["2.3.0"],"last_affected":[],"package":"composer/composer","purl":"pkg:composer/composer/composer","source":"GHSA-wg36-wvj6-r67p"}],"prev":{"headline":"Axios has Unrestricted Cloud Metadata Exfiltration via Header Injection Chain","id":"CVE-2026-40175"},"products":["composer"],"published":"2026-04-15","related":[{"cvss_score":8.8,"headline":"Composer has Command Injection via Malicious Perforce Reference","id":"CVE-2026-40261","kev_date_added":null,"published":"2026-04-15"},{"cvss_score":8.8,"headline":"Code execution and possible privilege escalation via compromised InstalledVersions.php or installed.php in Composer","id":"CVE-2024-24821","kev_date_added":null,"published":"2024-02-08"},{"cvss_score":8.8,"headline":"Composer allows cache poisoning from other projects built on the same host","id":"CVE-2015-8371","kev_date_added":null,"published":"2023-09-21"},{"cvss_score":8.2,"headline":"Command injection in composer on Windows","id":"CVE-2021-41116","kev_date_added":null,"published":"2021-10-05"},{"cvss_score":1.3,"headline":"Composer vulnerable to ANSI sequence injection","id":"CVE-2025-67746","kev_date_added":null,"published":"2025-12-30"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-07-15","vendors":["composer"]},"summary":"Attackers can execute arbitrary commands via malicious Perforce parameters in composer.json, affecting developers running Composer on untrusted projects.","url":"https://insights.sbomify.com/CVE-2026-40176/"}